CAS No. 7446-08-4

Purity： >/= 98%
Package: 25Kg/drum
MOQ: 25Kg
Delivery Time: 5 days (Transportation and Sailing Time is not included)
Supply ability: 600T/y

Appearance	White crystal
Selenium Dioxide	≥ 98.0 %
Hydrochloric acid insoluble	≤ 0.02 %
Fe	≤ 0.002 %
Loss on drying	≤ 1.0 %
Selenate and sulphate	≤ 0.1 %
Water dissolution test	Eligible
Chloride (Cl)	≤ 0.005%
Heavy metal	≤ 0.06%
Standard	Technical grade
Capacity	100MT/month
Loading port	Shanghai
Use	Selenium dioxide can be used as manganese electrolysis additive, microelement additive for beverage, blackening agent for steal material.Selenium dioxide can be used to deposit zirconium, hafnium and selenium compounds
Package	25kg/drum,or according to the customers' demand
Storage	Stored in the dry and ventilated inside storeroom, prevent direct sunlight, slightly pile and put down

Molecular Formula: O2Se

More details are to be found on supplier website

Purity: 99%
Spec 1: White powder
Application: It is used as an oxidant, catalyst, chemical reagent for organic compounds, and a raw material for the manufacture of various inorganic selenium compounds. It is also used in copiers, rectifiers, etc.

Property	white crystal powder
Selenium Content	≥ 69%

Selenium Dioxide 98%min

Selenium dioxide Basic information

Product Name: Selenium dioxide
Synonyms: Selenious acid anhydride;SELENIOUS ANHYDRIDE;SELENIUM AA/ICP CALIBRATION/CHECK STANDARD;SELENIUM AA SINGLE ELEMENT STANDARD;SELENIUM, AAS STANDARD SOLUTION;SELENIUM AA STANDARD;SELENIUM ATOMIC ABSORPTION SINGLE ELEMENT STANDARD;SELENIUM ATOMIC ABSORPTION STANDARD
CAS: 7446-08-4
MF: O2Se
MW: 110.96
EINECS: 231-957-4
Product Categories: Inorganics;Metal and Ceramic Science;Oxides;Selenium;Others;Oxidation;Synthetic Reagents;metal oxide
Mol File: 7446-08-4.mol

Selenium dioxide Chemical Properties
mp 315 °C (subl.)(lit.)
bp 684.9 °C(lit.)
density 4.81 g/mL at 25 °C(lit.)
vapor pressure 1 mm Hg ( 157 °C)
Fp 315°C
solubility H2O: soluble
form powder
color white
Water Solubility 38.4 g/100 mL (14 ºC)
Sublimation 315 ºC
Merck 14,8434

Stability: Stable. Incompatible with organic materials, strong acids, ammonia, nitric acid, halogen acids. Protect from moisture.
CAS DataBase Reference 7446-08-4(CAS DataBase Reference)
NIST Chemistry Reference Selenium dioxide(7446-08-4)
EPA Substance Registry System Selenium oxide (SeO2)(7446-08-4)

Selenium dioxide Usage And Synthesis

Chemical Properties yellowish white to reddish powder or crystals
General Description A white or creamy-white volatile lustrous crystal or crystalline powder with a pungent sour smell. Melting point 340 deg C. Density 3.954 g / cm3 . Toxic by ingestion and inhalation.
Air & Water Reactions In presence of water will corrode most metals [USCG, 1999]. Readily soluble in water forming selenious (selenous) acid.
Reactivity Profile Inorganic oxidizing agents, such as Selenium dioxide , react with reducing agents to generate heat and products that may be flammable, combustible, or otherwise reactive. Selenium dioxide reacts with water, particularly hot water, to give selenious (selenous) acid, a weak acid that is corrosive. Stable to light and heat. Rapidly absorbs dry hydrogen fluoride, hydrogen chloride, hydrogen bromide to form the corresponding selenium oxohalide. A good oxidizing agent. Reacts oxidatively with ammonia to form dinitrogen gas and selenium [Merck]. Oxidizes many organic substances.
Health Hazard Absorption of selenium may be demonstrated by presence of the element in the urine and by a garlic-like odor of the breath. Inhalation of dust can cause bronchial spasms, symptoms of asphyxiation, and pneumonitis. Acute symptoms of ingestion include sternal pain, cough, nausea, pallor, coated tongue, gastrointestinal disorders, nervousness, and conjunctivitis. Contact with eyes causes irritation.
Fire Hazard Special Hazards of Combustion Products: Sublimes and forms toxic vapors when heated in fire.

Raw materials Nitric acid-->Oxygen-->Selenium-->NITROGEN DIOXIDE